Cleanfeed doesn't usually score bad words in the message body, only in specific
headers: Subject, From, Message-ID and Organization. To extend this scoring
into the body, add the following to cleanfeed.local.

Usually headers such as NNTP-Posting-Host and X-Trace will reveal information
about the originator's hostname or IP address. Deleting these headers or
configuring them to not display is the obvious solution but doing so prevents
other Usenet users and providers from linking posts to a single source. One
alternative is to cryptographically secure this info with a one-way hash.

The following code snippet will hash the NNTP-Posting-Host header and remove
the X-Trace header. It should replace or be incorporated into the
filter_nnrpd.pl file.

Alternate version using Digest::SHA

This example uses the newer Perl extension, DIGEST::SHA. The chosen digest
is SHA256 but the extension is a complete implementation of the NIST Secure
Hash Standard. This also assumes the local server generates the Injection-Info
headers rather than the older, depreciated NNTP-Posting-Host.